CN202852263U

CN202852263U - Alloy O-shaped sealing ring

Info

Publication number: CN202852263U
Application number: CN 201220602880
Authority: CN
Inventors: 左国; 裴立明; 罗世洪; 李朋洲
Original assignee: Nuclear Power Institute of China
Current assignee: Nuclear Power Institute of China
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2013-04-03
Anticipated expiration: 2022-11-15

Abstract

The utility model discloses an alloy O-shaped sealing ring which comprises a sealing ring body, wherein the sealing ring body is bent by an alloy pipe, the interior of the sealing ring body is of a cavity structure, the sealing ring body has certain elasticity, and a port joint of the alloy pipe forms a welding region. The alloy O-shaped sealing ring provided by the utility model can form a self tightening type O-shaped sealing ring, a medium in a container or a pipeline enters a pipe inner cavity, the internal pressure of the container or the pipeline is acted on the inner wall of a pipe, the pipe can generate self tightening to be combined with the certain sealing specific pressure and resiliency when the pipe is squashed so as to achieve a sealing effect, the sealing ring is suitable for using in a high-pressure medium, and the sealing property is greatly improved compared with the traditional sealing original copy; and the nickel base alloy has characteristics of corrosion resistant and strong rebound elasticity and is capable of being used for the sealing ring, the structural design is reasonable, the property is reliable, the process is mature and viable, the integrality of a pressure boundary is guaranteed, and the sealing of different types of containers or pipe flanges is met.

Description

A kind of ALLOY O V-shaped ring

Technical field

The utility model relates to a kind of sealing tool, specifically refers to a kind of ALLOY O V-shaped ring.

Background technique

The hydraulic seal element is to belong to the hydraulic pressure auxiliary in hydraulic system, but also is an indispensable part.In working pressure and certain temperature range, should have good sealability, and along with the increase of pressure can the automatic lifting high sealing performance; Frictional force between seal arrangement and the movement parts is little, and friction factor will be stablized; Anti-corrosion capacity is strong, is difficult for wearing out, and long working life, wear resistance is good, to a certain extent can auto-compensation after the wearing and tearing.The type of seal arrangement has following several: clearance seal, clearance seal are to seal by the micro-gap between the relative movement part fitting surface, are usually used in the cylindrical fit pair of plunger, piston or valve; O-ring seals, O-ring seals is generally made with oil resistant rubber, and its cross section is rounded, and it has good sealability; Lip-type packing, lip-type packing can be divided into Y shape, V-arrangement, U-shaped, L shaped etc. according to the shape in cross section; Sealer with assembled is in the sealing that pipe joint connects, commonly used to three kinds of sealing means such as WD elastic packing, O RunddichtringO and hard sealings.In mechanical seal, seal ring is two ring-shaped work piecess of end face and relative sliding bonded to each other perpendicular to spin axis, it is the main Sealing of swivel joint, bear pressure medium and running shaft, housing friction during operation, the working life of the factor appreciable impact seal rings such as temperature, rotating speed and medium.

In the present sealing original paper, all are solid constructions, utilization has flexible rubber, plastic or other material is made, to seal the joint that original paper is placed on pipeline during use, after the pipeline at two ends was connected with means such as bolts, the sealing original paper between joint produced deformation and realizes sealability, or will seal original paper and cover on outside the joint, utilize the instrument such as buckle to make the sealing original paper be close to the both sides of gap at joint, play the effect of sealing with this.In the present sealing means, the material non-refractory of Sealing uses to be restricted in the environment of high temperature.

The model utility content

The purpose of this utility model is to provide a kind of ALLOY O V-shaped ring, is adapted at using under high temperature, the high-pressure situations, has than high sealing specific pressure and springback capacity, can reach the requirement of nuclear reactor and petrochemical industry container or piping flange sealing.

The purpose of this utility model is achieved through the following technical solutions:

A kind of ALLOY O V-shaped ring comprises the seal ring body, and the seal ring body is formed by the alloy pipe bending, and its inside is cavity structure, and it has certain elasticity, and the port joint of alloy pipe forms the weld zone.The seal ring body can utilize the circular or required forms of material bending such as the copper pipe, Stainless Steel Tube, monel metal pipe of thin-walled, its inside is cavity structure, form the weld zone after its port welding, the polishing moulding, the weld zone has identical or close physical property with the seal ring body, the effect of seal ring body has three kinds: the first kind is common O V-shaped ring, and after it was crushed, seal pressure and springback capacity were lower; Equations of The Second Kind is inflation O V-shaped ring, at inner solid material such as dry ice, the azodiisobutyronitrile etc. of filling easily vaporization of metal tube, during use, the packing material distillation, gas expansion produces pressure, and temperature is higher, overpressure is larger, and the compensation Strength of Metallic Materials reduces the seal pressure that causes and descends; The 3rd class is self tightening " O " V-shaped ring, medium in container or the pipeline enters tube cavity, container or manifold pressure act on tube wall, make pipe produce self-tightening, obtain certain seal pressure and resilience after flattening in conjunction with pipe again and reach sealing effect, such seal ring is adapted at using in the high-pressure medium.

Described seal ring body is made by nickel-based alloy pipe.Further, the seal ring body is made by nickel-base alloy, nickel-base alloy refers to have a class alloy of higher intensity and certain combination properties such as antioxidant anticorrosive ability under 650～1000 ℃ of high temperature, be subdivided into again Refractoloy according to main performance, abros, the nickel-base antiwear alloy, Ni-based precise alloy and Ni-based marmem etc., refractory alloy is according to the difference of matrix, be divided into iron-base superalloy, nickel base superalloy and cobalt base superalloy, wherein nickel base superalloy is called for short nickel-base alloy, nickel-base alloy has corrosion-resistant, the characteristics that rebound elasticity is strong can be used in seal ring.

Coat or be electroplate with metal layer at described this external surface of seal ring.Further, as further improvement of the utility model, the structural type of layer of metal layer is set by the outer surface at the seal ring body, metal layer can adopt the mode of plating, also can adopt parcel to paste the form of paying, when the seal ring body is crushed, built-in helical spring produces additional rebounding force to the seal ring body, and make the metal layer generation plastic deformation of this external surface of seal ring, filled up the tiny flaw on flange seal surface, sealing ring body has adopted the cooperation of elasticity and plasticity, makes it have good sealability and compensate because temperature and pressure fluctuates to cause flange distortion and the lax ability of seal ring; The seal ring body coats or electroplates the metal layer generation plastic deformation at this external surface of seal ring when being crushed, filled up the tiny flaw on flange seal surface, further improves its sealability.

The utility model compared with prior art has following advantage and beneficial effect:

A kind of ALLOY O V-shaped ring of 1 the utility model, can form self tightening " O " V-shaped ring, medium in container or the pipeline enters tube cavity, container or manifold pressure act on tube wall, make pipe produce self-tightening, obtain certain seal pressure and resilience after flattening in conjunction with pipe again and reach sealing effect, such seal ring is adapted at using in the high-pressure medium, with respect to traditional sealing original paper, its sealability improves greatly;

A kind of ALLOY O V-shaped ring of 2 the utility model, the characteristics that nickel-base alloy has is corrosion-resistant, rebound elasticity is strong can be used in seal ring, and reasonable in design, reliable performance, technical maturity are feasible, guarantee the integrity of pressure boundary, can satisfy the sealing of various types of containers or piping flange;

A kind of ALLOY O V-shaped ring of 3 the utility model, metal layer can adopt the mode of plating, also can adopt parcel to paste the form of paying, when the seal ring body is crushed, built-in helical spring produces additional rebounding force to the seal ring body, and make the metal layer generation plastic deformation of this external surface of seal ring, filled up the tiny flaw on flange seal surface, sealing ring body has adopted the cooperation of elasticity and plasticity, makes it have good sealability and compensate because temperature and pressure fluctuates to cause flange distortion and the lax ability of seal ring; The seal ring body coats or electroplates the metal layer generation plastic deformation at this external surface of seal ring when being crushed, filled up the tiny flaw on flange seal surface, further improves its sealability.

Description of drawings

Fig. 1 is the utility model overall structure schematic representation;

Fig. 2 is that the utility model is along its axial cross-sectional structure schematic representation.

Mark and corresponding component title in the accompanying drawing:

1-seal ring body, 2-weld zone, 3-metal layer.

Embodiment

The utility model is described in further detail below in conjunction with embodiment, but mode of execution of the present utility model is not limited to this.

Embodiment

Shown in Fig. 1 to 2, a kind of ALLOY O V-shaped ring of the utility model comprises seal ring body 1, and seal ring body 1 utilizes the nickel-based alloy pipe of thin-walled to bend to circle or required form, its inside is cavity structure, forms welding zone 2 in the welding of the joint, end of nickel-based alloy pipe; Electroplate layer of metal layer 3 at the outer surface of seal ring body 1, metal layer 3 has certain thickness, also can be with the structural type of parcel so that metal layer 3 pastes pays on seal ring body 1 surface.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, any simple modification, the equivalent variations on every foundation technical spirit of the present utility model above embodiment done all fall within the protection domain of the present utility model.

Claims

1. ALLOY O V-shaped ring, it is characterized in that: comprise seal ring body (1), seal ring body (1) is formed by the alloy pipe bending, and its inside is cavity structure, and it has certain elasticity, and the port joint of alloy pipe forms weld zone (2).

2. a kind of ALLOY O V-shaped ring according to claim 1, it is characterized in that: described seal ring body (1) is made by nickel-based alloy pipe.

3. a kind of ALLOY O V-shaped ring according to claim 1 and 2 is characterized in that: coat or be electroplate with metal layer (3) at described seal ring body (1) outer surface.